9 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 46383 | Valparaiso | 42,183 |
| 46385 | Valparaiso | 40,856 |
| 46368 | Portage | 40,301 |
| 46304 | Chesterton | 28,307 |
| 46341 | Hebron | 10,048 |
| 46347 | Kouts | 4,951 |
| 46301 | Beverly Shores | 650 |
| 46393 | Wheeler | 216 |
| 46302 | Boone Grove | 29 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 9 ZCTAs in Porter County, Indiana (US Census).